and therefore automatically multi-platform

But not necessarily multibrowser.

Damn those people developing only for Chrome.

Legal liability for when the service, inevitably, gets breached. If the government hosts it, they're liable. If the vendor hosts it, the vendor is liable. Simple as money matters.

So you're saying that other options do exist but some companies don't want to use them because Microsoft is very popular, which is kind of a circular thing, and I understand, but it's a sign of laziness, not quality.

Teams is just an incomprehensible version of Discord. What's the open source version of that? Matrix?

Yes, but only in Europe, and no Americans are allowed.

Do you like work for Microsoft or something, you’re all over this post

You’re way off here. Microsoft are the industry leaders in this space because they’re so far ahead of everyone else because they focus on this stuff. They’re far from lazy, they’re the opposite in fact. As someone who manages the whole MS suite from entra to dev ops all the way to managed instance dbs and defender and everything in between daily, their integration across everything and their pace of updates is insane.

What products specifically are you calling “outdated junk” and why?

Teams is just a copy of old functionality. It doesn't offer anything new. Especially considering their funds and reach. Yet it just promotes the old document / paper world. I'm sure that is intentional. As they need to keep office going. The world should have moved on from documents by now.

What on earth are you talking about by “promotes the old document/paper world”?

Today, when people deal with information digitally, we should be in control in the way we need it. Individual pieces of information should be easy to send, edit, automate, consume and share, without IT getting in the way. Sadly the old files, silos, incompatibility, and systems designed for printing paper documents is still dominant. MS need that. To keep their dominance from the days when they grew powerful and got caught abusing their their monopoly position.
We need to move past this mess as soon as we can.

You wrote all of that without actually saying anything.

How does any of….. that….. apply to this situation? Microsoft are one of the biggest pushers of “all digital” there is.

Their priority is sustaining profit. Which needs them to keep the status quo, not innovate. Teams is not innovation.
If you are satisfied with what we have today, the next generation of digital information will really surprise you. Yet it would have been available 30 years ago if not for big business monopolies and lack of imagination among techies.

Again - you’re writing a lot but saying nothing.

What exactly are you talking about? Give specifics. What exactly are Microsoft “holding back”? How are they only keeping the status quo by having the most integrated all-in-one ecosystem on the market?

I’m not sure why you expect teams to be innovative in the first place?

Surely you want to have good digital communication? And surely you want Teams to help people communicate really well?
But it sounds like you are satisfied with Teams. It appears you have low expectations of communication.
You've read the problems people have posted here. Such as when working with multiple companies different teams. So as a starter, a choice of teams clients is missing. Next, teams is not an open standard. To allow connection with other non Teams networks. Next, Teams attempts to integrate your information. But only allows files pictures and text. Information is so much more. It could be a date, an invite, an invoice, a question, a holiday, an insurance.
If it helps, understand that non IT people want to manage this information in a direct, non IT, non text way. MS products rank very low in this regard.
If all you can imagine is what MS has, then maybe you might understand when it's put in front of you.

You’re still not giving specifics or making any sense.

“Information could be a holiday, an insurance”

What on earth are you talking about?

Those are the sort of pieces of information people actually have, and need to manage digitally. There will be ways to do this, where you see your information. Not files, or other IT mechanisms. You can create, sort and share them directly. They will have security, and ways to automate processes. You won't need 10 different applications to do this, or 6 incompatible online silos, or 4 different folder structures to organise it. Just one. Much less to learn, as you use one thing every time. And all using 90's tech.

You’re a master of stringing a very large number of words together without actually saying anything of any meaning.

You still haven’t given a single specific example of what you’re talking about and how Microsoft’s products don’t allow it.

So the requirement is to display information, such in the examples I gave. Where you can create new, edit existing ones, organise them in your preferred structure, and actively share them. All without doing unnecessary IT operations. All in one UI environment.

So……OneNote.

Avoid confusing information with text. Avoid forgetting about open standards.